Routing information generating apparatus, routing information generating method and routing information generating program

Network connecting sections of an own station deliver routing information notified from a relay section on the same base to network connecting sections of other stations of own networks. If new routing information is present in routing information received from the network connecting sections of the other stations, the network connecting sections of the own station notify the relay section on the same base of the routing information. The relay section updates, based on the routing information notified from the network connecting sections on the same base, routing information held by the relay section.